The Banksy is left at the Banksy, right at the Banksy and opposite the Banksy

Tesco has followed Sainsbury’s lead by installing cameras above self-checkouts to identify when shoppers fail to scan an item properly, using the footage to provide a live-action replay of their misdeed. Predictably, it’s not gone down well: a video posted on Instagram involving a can of tuna got more than 3.5 million views. When will the supermarkets learn to stop